When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Price: $649.95
This For A Complete Set (Price IS For2Cylinder Heads) Straight Plug Of Aluminum Heads
Good up to 600 Lift
Port Finish:As CastChamber Finish:As CastCasting Material:Alum.
Head Gaskets
The headgasket we recommend for our 23deg. heads used on 327/350/383/400 SBC engines without steam holes is Felpro #1003.
On engines using the GM 400 block, or aftermarket blocks with steam holes, use Procomp # PC5213 or Felpro # 1014. Intake Gaskets
Our heads are manufactured with both the conventional intake manifold bolt pattern, and the Vortec bolt pattern.
If you\'re installing a Vortec manifold, use Felpro #1255 gaskets.
If you are using a convential intake manifold, Felpro #1255 gaskets. Push Rods
Our aluminum 23deg. heads typically use +.100\' (longer than stock) pushrods, Depending on the components used, it is possible that you may need pushrods shorter or longer than that so we recommend that you use an adjustable pushrod to dial in your rocker geometry and order pushrods to match.Spark Plugs
All Procomp 23deg. SBC heads use standard 14mm. x 750\' reach, 5/8 hex, gasket seat sparkplugs like NGK R5671A-7, Autolite 3924, Champion RC12YC, etc.
Remember that higher compression/ boost require a colder heat range sparkplug. Head Bolts / Studs
Our 23 degree heads utilize standard head bolts or studs.
Our part number for head bolts is PC-2451-BOLT, and the head studs are PC-2451
The ARP head bolt part number is 134-3601, and ARP head studs 234-4301 for the 23 degree heads. Exhaust Gaskets
We recomend the use of our Fel-Pro # 1405 on our 23 degree heads.
Tracking info provided for all items, UPS is preferred and is extremely accurate, USPS is provided but sometimes won\'t show in system until it reaches YOUR post office.If you are having issues with Ebay/Paypal or product questions, please feel free to call us at [phone removed by eBay].